Mantis Tiller Carburetor

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  #1  
Old 04-28-14, 01:08 PM
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Mantis Tiller Carburetor

I have a Mantis Sv-4 tiller with a C1U ZAMA carburetor. Tiller has not run in years. I dismantled the carburetor to find it plugged bad with a black substance caked in it. I ordered an overhaul kit and cleaned it with carburetor cleaner and compressed air. Installed the overhaul kit and reassembled the carburetor. Following the start instructions for an initial start,I found that I could not pump fuel with the primer bulb. After repeated attempts to blow out all passages,I still can not pump fuel. The primer bulb seems ok. No cracks or punctures. HELP!! Anyone have any idear where I went wrong??
 
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Old 04-28-14, 01:27 PM
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Carb cleaner may not get everything. Dipping is usually more effective. Check the gasket between the primer and the fuel pump, make sure there is no damage or that the passage on gasket wasn't left untapped from factory.There should be a small jet(s) behind the gasket, make sure you can blow carb cleaner through them and out of the other side. If not try taking an old guitar string (the smaller E string would probably be best) and push it through the jet and clear out any blockage.

That said, my first guess would be either bulb or the gasket/mating surface.
 
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Old 04-30-14, 06:18 AM
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mantis carburetor problem

Went thru purge pump again, with cleaner and a wire. Still wont draw fuel. Pulled start cord enough that I got fuel pump to pump fuel into carb and purge pump. However, pushing the purge bulb, I can now see full in line from pump to tank, but when bulb is released the fuel withdrawers back into the bulb. Is there a check valve somewhere that is stuck??
 
  #4  
Old 04-30-14, 06:38 AM
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There are valves in the piece under the carb that might be leaking.
 
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